过去分词(past participle)是分词的一种。规则动词的过去分词一般是由动词加ed构成，不规则动词的过去分词见不规则动词表(见教材P114－P115)。
[观察例句]
1．Before the show，hundreds of excited visitors waited in their seats eagerly.
2．Come and read the poem written by an eightyearold boy!
3．I felt myself often confused at first.
4．She had her painting boxed so it was delivered safely.
[归纳用法]
一、过去分词作定语
1．意义
及物动词的过去分词作定语往往表示被动和完成；不及物动词的过去分词作定语不表示被动，只表示完成。
(1)表示被动和完成
a polluted river一条被污染的河流
the watered flowers浇过水的花
(2)只表示完成，不表示被动
fallen leaves落叶
the risen sun升起的太阳
